Discussion
Consider the following pairs:
| 1. | If A=1, B=2 | then CAT = 24 |
| 2. | If Z=1, Y=2 | then BAT = 25 |
| 3. | If A=1, B=2 | then RAT = 39 |
How many of the above pairs are correctly matched?
Answer: B
Only two pairs are correctly matched.
Pair 1, with A = 1, B = 2 and so on: C + A + T = 3 + 1 + 20 = 24. Correct.
Pair 2 reverses the alphabet, Z = 1, Y = 2, so a letter at position p gets \(27 - p\): B = 25, A = 26, T = 7, and BAT = 58, not 25. Incorrect.
Pair 3: R + A + T = 18 + 1 + 20 = 39. Correct.
The trap in pair 2 is to read B = 25 and stop; the code is the sum of all three letters.
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